Hi All,

Here is the CERNET/Internet2 view on how to solve the inter-domain SDN problem: http://netarchlab.tsinghua.edu.cn/~junbi/IEEEComMag-2015.pdf

They are essentially proposing to use the ‘WE-bridge’ concept as a replacement of BGP.  I see a lot of similarities to NSI, including a ‘abstracted topology’ that is similar to the NSI topology.

I note also that they propose the WE-bridge should be able to exchange: “information such as OpenFlow version and number of the FlowTables on each node, link utilities, and flow entries, we extended the LLDP by adding an LLDP extension module.” 

I did have in mind that the MOTE open call (that GÉANT funded UvA to work on) would look at similar questions, however their work ended up focusing on developing a solution to the topology distribution challenge (this proved to be useful input to the NSI standard). 

I wonder if now would be a good time to start looking at flow-extensions to NSI?  I think we should be able to do this by extending the NML topology and creating a new NSI service definition for flow based services.

Any thoughts on this?

Guy

Guy Roberts PhD

Senior Transport Network Architect

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